add curl library v7.64.1 with SSL support

curl/Makefile

@@ -0,0 +1,40 @@
+# Port Metadata
+PORTNAME =          curl
+PORTVERSION =       7.64.1
+
+MAINTAINER =        Damian Parrino <[email protected]>
+LICENSE =           custom
+SHORT_DESC =        A library for transferring data with URL syntax.
+
+# This port uses CMake.
+PORT_BUILD =        cmake
+
+# Provide SSL support library
+DEPENDENCIES =      zlib polarssl
+
+# What files we need to download, and where from.
+DOWNLOAD_SITE  =    https://curl.haxx.se/download
+DOWNLOAD_FILES =    ${PORTNAME}-${PORTVERSION}.tar.gz
+
+TARGET =            libcurl.a
+
+# attempt to install the headers locally.
+HDR_DIRECTORY =     include/curl
+
+# cmake build arguments
+CMAKE_ARGS =        -DCMAKE_USE_POLARSSL=1 -DUSE_UNIX_SOCKETS=0 -DENABLE_IPV6=0 -DENABLE_THREADED_RESOLVER=0 -DBUILD_CURL_EXE=OFF -DBUILD_SHARED_LIBS=OFF -DBUILD_TESTING=OFF
+
+# Add a pre-build target to adjust the source code
+PREBUILD = curl_prebuild
+curl_prebuild:
+	cp files/CMakeLists.txt build/${PORTNAME}-${PORTVERSION}
+	cp files/FindPolarSSL.cmake build/${PORTNAME}-${PORTVERSION}/CMake
+
+# Add a pre-install target to get the built library where we expect it.
+# This, copied from opus, might be solvable by
+# adding an equivalent to HDR_DIRECTORY for lib
+PREINSTALL = curl_preinstall
+curl_preinstall:
+	cp build/${PORTNAME}-${PORTVERSION}/lib/${TARGET} build/${PORTNAME}-${PORTVERSION}
+
+include ${KOS_PORTS}/scripts/kos-ports.mk

curl/distinfo

@@ -0,0 +1,2 @@
+SHA256 (curl-7.64.1.tar.gz) = 432d3f466644b9416bc5b649d344116a753aeaa520c8beaf024a90cba9d3d35d
+SIZE (curl-7.64.1.tar.gz) = 4008103